In a multi X-brick cluster, what happens when both DAE Controllers in a single X-Brick fail?

In a multi X-brick cluster, each X-brick consists of multiple Disk Array Enclosures (DAEs) that work together to provide storage and data redundancy. If both DAE controllers in a single X-Brick fail, the impact is localized to the LUNs (Logical Unit Numbers) that store data on that particular DAE. The entire cluster does not shut down; rather, only the data on the affected DAE becomes unavailable. This design ensures that the rest of the cluster continues to operate normally, albeit with potential performance degradation depending on the data distribution and workload.
Reference: [Dell EMC XtremIO Architecture Guide]